Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'bef7ec608e545bf138da2f917da59342cff6a92b989554c801f64a388a0ad3f2' 
  AND token = 'Xq/Ur6jOJdN8Vxp/8SX15kpY4LxSO0rjJlTrRyrbJcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}